Question

Please do in proper steps

Answer 1

Answer:

We know that

(a+b+c)² = a²+b²+c² + 2×(ab+bc+ac)

(a+b+c)² = 250 + 2×3

(a+b+c)²= 256

a+b+c = √256

a+b+c = ±16

Step-by-step explanation:

Answer 2

hope it will helpful